(57) A vacuum blood-collection tube comprises a tube-shaped vessel having an opening through
which air can be removed, and a plug that makes the opening air-tightto maintain low-pressure
conditions inside the said vessel, the raw materials of the said vessel being polyethyleneterephthalate,
a copolymer of polyethylene-terephthalate, or an acrylonitrile resin, and the inner
walls of said vessel incorporating a hydrophilic substance that is either difficult
or impossible to dissolve in water and that prevents blood clots from adhering to
the inner walls of said tube, a water-soluble substance, and an adsorptive inorganic
substance.
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